It would be great to be able to top up with other currencies, even without the need of having a balance in those.
Top up by credit card: would it be very complicated to charge a foreign credit card in its own currency, to avoid fees (except your 1.3% of course)?
Bank transfer: since you are able to send money to bank accounts in almost any currency through your many “gateway accounts” around the world, wouldn’t it be possible to use those to accept top ups in other currencies, too?
Just to be clear: this doesn’t mean that I don’t want a balance in other currencies. Just trying to think of easier (read: available sooner) ways to save on the top up fees, for people outside of the €, GPB, $ zone like me!